Mounting device



' Aug. 1, 1944. ,A. w. FRANKLiN 2,354,748

MOUNTING DEVICE Filed May 15, 1945 A++KS.

Patented Aug. 1, 1944 UNITED STATES PATENT O F Fl'C E MOUNTING DEVICE 7 Albert W. Franklin, New York, N. Y. Application 'May 15, 1943, Serial No. 487,109 7 5 Claims. (Cl. 173-339) This invention relates to improvements in mounting means by which mechanical, electrical A further object of the invention is to provide in an arrangement which .is easily locked against loosening or undesired removal by reason of vibration.

The detailed objects of this invention will be apparent from the following description .of a specific embodiment-thereof.

Thisinventionresides substantiallyin the combination, construction, arrangement and relative as will be described .in detail location of parts, below.

In the accompanying drawing,

Figure l is a bottom plan view of the insulating body portion of a vacuum tube socket;

Figure 2 is a side elevational view showing a portion in cross section;

Figure 3 is a side elevational view of the socket mounted and looked upon a support in accordance with the subject matter of this invention;

Figure 4 is a top plan view of the locking ring;

and

Figure 5 is an edge elevational view thereof, As the description of the subject matter of this right angle shoulders as indicated at II.

invention proceeds it will become apparent that '3 the invention is of such a nature that it may be employed for mounting all kinds of devices upon supporting chassis, panels and the like. However, for the purposes of disclosure the description will be limited to an application of the subject matter of the invention to a radio tube r ist nce of the material thereof.

socket illustrating how it may be mounted and locked upon a chassis.

The socket comprises a suitably shaped body I of insulating material which, as is frequently the case in this art, may be a ceramic. As illustrated the body is generally cylindrical in form, with a circular passage 6 through the center thereof in communication with a longitudinally extending notch 6' commonly providedin such devices for aligning a radio tube for application to the socket in correct position. In the structure illustrated there are two portions of generally different diameters, forming a head or face 2 representing the side from which the radio socket is mounted. The portion of smaller diameter is longitudinally grooved or fluted to provide a series of radial extensions ,3 which are not cut in Circumferential alignment to form an interrupted annular groove 4, as is clearly apparent from the various figures. Where theportions of different diameter come together and adjacent the groove ,Jser-ies of axialpassages 5 in which the socket contacts, not show-n, ,are mounted. The nature, construction and function of these contacts form no part of thisyinvention, and further reference to them therefore seems unnecessary.

The lofi ing ring comprises an annulus 9 of suitable material such as for examplephosphor bronze, which has struck out therefrom at equidistant circumferential points, a series of spring fingers l0 which are longitudinally curved as is clear from the several figures. The number of these spring fingers corresponds to the number of longitudinal ribs 3 formed on the body of the socket. As illustrated the transverse width of these fingers and their position on the shaft is such that they project radially inwardly with respect to the annulus a short distance forming The ring 9 is preferably dished, by which is meant that the plane of the band forming the ring may be inclined upwardly to form what may be termed a very shallow truncated cone, so that any pressure applied to the face of the ring will 4 to a position shown in Figure 3.

tend to flatten it out against the resiliency and In mounting the socket on the chassis the fluted hub portion is passed through a similarly shaped aperture in the plate, which aperture has a diameter approximately equal to the diameter of the seat 1, so that the flanged head 2 rests against a face of the plate 8. The ring9 is then slipped over the fluted hub with the ears I0 aligned with the longitudinal flutes formed by the ribs 3 until the ring lies against the opposite face of the plate 8 as appears in Figure 3. The

ring is then given a rotation such that the fingers l I are forced into the interrupted groove sections The direction of rotation is opposite to the direction in which the longitudinally curved fingers l0 extend so that they will ride easily into the interrupted slot sections 4 and bite into the opposed walls of the slots to resist any reverse rotation. In the case where the ring is slightly dished it will be forced back towards a flat position to increase the pressure of the ring between the plate 8 and the socket. The peripheral notches [2 provide additional points for pins which will bite into the adjacent face of the plate 8 to further resist loosening movement. It is unnecessary to disclose here the details of the various forms which devices or tools may take to aid in moving the ring into locking position. It may be indicated,

however, that a hollow tool similar in some re- 1 I of said groove and lying against the side of said spects to a socket wrench may be provided with suitable projections to engage the fingers and cause the ring to rotate into locking position. It will be a sort of spinner wrench which may take different forms, and it might for example be constructed to cooperate with the notches l2 to cause this movement. However, the nature and details of construction of such a tool form no part of this invention;

From the above description it will be seen that the subject matter of the invention is not limited in its application as illustrated to radio tube sockets but may be applied for the purpose of mounting many different kinds of devices on their supports, It is apparent that the aperture in the plate 8 will correspond to the shape of the device, as will the ring, and that in its most useful application these parts will all be of circular form. It may also be noted that it is not strictly necessary that the spring fingers [0 be longitudinally curved in[ an upward direction since they may take other positions and forms while acting in a manner generally similar to the type illustrated for facilitating themovement of the locking ring into locking position and resisting, but not absolutely preventing, movement in the opposite direction to dismount the parts when desired.'*

Those skilled in the art will readily appreciate therefore that the subject matter of this invention may be embodied in other physical forms, and I do not, therefore, desire to be strictly limited to the exact form illustrated, but rather by the scope of the claims granted me.

What is claimed is:

1. A structural combination as described com prising a device to be mounted on a support having a head and a hub, an interrupted annular groove'formed on said hub, a support engaging said head and a locking ring having a plurality of cantilever spring fingers engaging the sections support opposite to said head. 2. In the combination of claim 1, said fingers being longitudinally curved so that an edge of each thereof bitingly engages one wall of the associated groove section.

3. The combination as described comprising a socket member having a flanged head and an integral hub provided with longitudinal exterior ribs, said ribs being grooved adjacent said head to form an interrupted channel about said hub, a supporting plate for said socket. through which the hub'projects and lying against said head, and a continuous locking ring surrounding said hub and having a plurality of integral cantilever during mounting of the ring and said spring fingers being longitudinally curved so that their 40 end edges bite into the groove walls.

ALBERT. W. FRANKLIN. 

